package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.MealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.GetMapping;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class MealServiceImpl implements MealService {

    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private DishMapper dishMapper;

    /**
     * 新增套餐
     * @param setmealDTO
     */
    @Transactional
    public void saveWithDish(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);
        setmealMapper.insert(setmeal);
        //保存套餐和菜品的关联关系
        Long setmealId = setmeal.getId();

        //获取当前套餐的菜品
        List<SetmealDish>setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });
        //批量插入
        setmealDishMapper.insertBatch(setmealDishes);
    }

    /**
     * 套餐分页查询
     * @param setmealPageQueryDTO
     * @return
     */
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        int pageNum=setmealPageQueryDTO.getPage();
        int pageSize=setmealPageQueryDTO.getPageSize();

        PageHelper.startPage(pageNum,pageSize);
        Page<Setmeal> page = setmealMapper.pageQuery(setmealPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 批量删除套餐
     * @param ids
     */
    @Transactional
    public void delete(List<Long> ids) {
        ids.forEach(id -> {
            Setmeal setmeal = setmealMapper.getById(id);
            if(StatusConstant.ENABLE == setmeal.getStatus()){
                //起售中的套餐不能删除
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        });
        setmealMapper.delete(ids);
        setmealDishMapper.deleteBySetmealIds(ids);
    }




    /**
     * 修改套餐
     * @param setmealDTO
     */
    @Transactional
    public void update(SetmealDTO setmealDTO) {
        Setmeal setmeal=new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        setmealMapper.update(setmeal);
        List<Long>setmealId=new ArrayList<>();
        setmealId.add(setmealDTO.getId());
        //删除套餐和菜品的关联数据
        setmealDishMapper.deleteBySetmealIds(setmealId);

        List<SetmealDish>setmealDishes=setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealDTO.getId());
        });

        setmealDishMapper.insertBatch(setmealDishes);
    }

    /**
     * 根据id查询套餐
     * @param id
     * @return
     */
    public SetmealDTO getById(Long id) {
        Setmeal setmeal = setmealMapper.getById(id);
        SetmealDTO setmealDTO = new SetmealDTO();
        BeanUtils.copyProperties(setmeal,setmealDTO);
        return setmealDTO;
    }

    public SetmealVO getByIdWithDish(Long id) {
       Setmeal setmeal = setmealMapper.getById(id);
       List<SetmealDish>setmealDishes = setmealDishMapper.getBySetmealId(id);
       SetmealVO setmealVO = new SetmealVO();
       BeanUtils.copyProperties(setmeal,setmealVO);
       setmealVO.setSetmealDishes(setmealDishes);
       return setmealVO;
    }

    /**
     * 起售停售套餐
     * @param status
     * @param id
     */
    public void startOrStop(Integer status, Long id) {
        if(status==StatusConstant.ENABLE){
            List<Dish>dishList=dishMapper.getBySetmealId(id);
            if(dishList!=null && dishList.size()>0){
                for (Dish dish : dishList) {
                    if(dish.getStatus()==StatusConstant.DISABLE){
                        throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
                    }
                }
            }
        }
        Setmeal setmeal = Setmeal.builder()
                .id(id)
                .status(status)
                .build();
        setmealMapper.update(setmeal);
    }


    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }
}
